CN201496448U - Working pliers for automatic stepless compensation of abrasion gap of disc brake - Google Patents
Working pliers for automatic stepless compensation of abrasion gap of disc brake Download PDFInfo
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- CN201496448U CN201496448U CN2009201731009U CN200920173100U CN201496448U CN 201496448 U CN201496448 U CN 201496448U CN 2009201731009 U CN2009201731009 U CN 2009201731009U CN 200920173100 U CN200920173100 U CN 200920173100U CN 201496448 U CN201496448 U CN 201496448U
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Abstract
The working pliers for automatic stepless compensation of abrasion gap of disk brake is used for hydraulic disk brake of winch of drilling machine and workover rig. Is characterized in that: the plunger penetrates through a center hole of the oil cylinder cover and is inserted into the piston, and the piston is arranged in the cylinder body to form the composite hydraulic cylinder. A clearance of 1-3 mm is reserved between the piston and the oil cylinder cover. A check valve is mounted in the central bore of the piston. A communication hole is formed between the outer end and the inner end surface of the plunger and a hydraulic joint is fixed. The center of the end face of the piston is provided with a cylindrical boss, the center of the inner bottom surface of the cylinder body is provided with a cylindrical groove, and four semicircular grooves with the depth shorter than that of the groove are uniformly distributed in the circumferential direction of the groove. The effect is as follows: the working tong oil cylinder can compensate the clearance generated by abrasion in braking, and the retraction amount of the working tong oil cylinder is kept to be a designed value. When the brake block and the brake disc generate a gap due to abrasion, the working pliers can realize stepless compensation due to the automatic gap compensation function of the working pliers oil cylinder, and the brake gap is ensured.
Description
Technical field
The utility model relates to oil-well rig, well repairing machine winch hydraulic disc brake device, the working clamp open in usual of the wearing clearance between particularly a kind of automatic stepless compensation brake block and brake disc.
Background technique
At present, hydraulic disc brake has been widely applied on oil-well rig and the well repairing machine.In drilling well, workover eration, braking device is being undertaken control drilling tool lowering velocity, guarantees the important function of drilling and workover machines safety in production operation.The performance quality of hydraulic disc brake directly affects the Security of drilling efficiency and drillng operation.In hydraulic disc brake device brake operation, in most cases check brake disc and realize braking, and most wearing and tearing are in the friction process that occurs between working clamp brake block and the brake disc by working clamp.It is very fast to cause between working clamp brake block and the brake disc gap to increase like this, needs often to adjust, if adopt artificial the adjustment, needs to shut down and safeguards, not only workload is big but also increased non-working time of drilling and workover machines, influences drilling efficiency.Thereby how timely cause the working clamp braking gap after the stepless compensation work pincers brake block wearing and tearing be a very important problem.
The methods of widely applying in the reality at present that wearing clearance between two kinds of adjusting brake block and the brake disc is arranged.First method is to adopt the screw spring formula to regulate, and promptly adopts the nut on the manual tune screw rod, the gap between compensation brake block and the brake disc.But there is bigger narrow limitation in this method: the one, need manual tune, and complex operation, labor intensity is bigger; The 2nd, the brake block wearing and tearing of when construction are very fast making a trip fast, and the gap increases fast between brake block and the brake disc, is difficult to accomplish that timely adjusting nut comes compensate for clearance; The 3rd, need regular adjusting, may there be carelessness in on-the-spot operator, regulate untimely, the opportunity of the adjusting play that occasions a delay.Second method is the gap of adopting between biliquid cylinder form compensation brake block and the brake disc, similar to the utility model, also on the working clamp oil cylinder, increase a fluid cylinder specially in order to regulate the working clamp braking gap, but this oil cylinder is to need by manually remedying the oil cylinder volume space that the braking gap increase causes from a kind of hydraulic disc brake device hydraulic system that is different from of external complement with oily working medium, and this mechanism can not compensate wearing clearance between brake block and the brake disc equally automatically.This method not only exists the narrow limitation of three aspects of first method equally, but also needs the special configuration working medium with oil and compensate for clearance usefulness oiling equipment, drainage device, inconvenient maintenance, cost height.
Consult Fig. 1.Oil drilling and workover machines hydraulic disc brake generally comprises hydraulic control unit, operation control unit and brake actuator three parts, and brake actuator is formed by installing and fixing tong holder, brake disc, working clamp 1 and catch block 2 etc.In this hydraulic disc brake, working clamp 1 is a brake calipers open in usual, and when not giving the working clamp oil cylinder for pressure oil, the working clamp oil cylinder is not elongation under the effect of tension spring tension, and is gapped between brake block and brake disc; Hydraulic oil as certain pressure enters the working clamp oil cylinder, the elongation of working clamp oil cylinder, by leverage, be fixed on the pitch smaller between two relative brake block on the caliper, and fit on the brake disc, the frictional force that brake block affacts on the brake disc is directly proportional with the oil pressure that enters the working clamp oil cylinder.Catch block 2 is Normally closed type braking clamps, and the catch block oil cylinder is built-in with belleville spring, and when not having pressure oil to enter the catch block oil cylinder, the piston in the catch block oil cylinder stretches out under the effect of belleville spring, and by leverage, brake block is adjacent to brake disc, realizes brake; Hydraulic oil as certain pressure enters the catch block oil cylinder, the compression belleville spring, and the catch block oil cylinder shortens, and by leverage, brake block leaves brake disc, forms the gap, and brake is unclamped.
Working clamp 1 is opposite with the working state of catch block 2, forms a combined type brake system, forms the braking mechanism of safety interlock, guarantees that whole oil drilling and workover machines brake system is safe and reliable.
The Chinese patent notification number is CN2448999Y, and a kind of clearance automatic compensation master cylinder is provided, and adopts biliquid cylinder form.Structure is: a large and small piston and a reducing cylinder body that is combined into one by the cylinder body of two different cylinder diameters are arranged.Big piston and spacing spacer place in the big cylinder diameter of reducing cylinder body successively; Small piston is relative with big piston and be close to, and is loaded in the little cylinder diameter of reducing cylinder body.The perpendicular distance of the top and spacing spacer end face of the perpendicular distance of platform and big piston is equivalent in the bottom surface of big piston and the reducing cylinder simultaneously.Advantage is that braking is sensitive, compensates the friction gap of brake block and brake disc safely and reliably automatically.
The Chinese patent notification number is CN101169164A, and a kind of brake calipers of disk type brake automatic compensation gap is provided, and adopts ratchet ratch mechanism form.Structure is: the ratchet of band from return spring is housed having on the cylinder cap, is processed with ratchet on piston rod.By the ratchet ratch mechanism on the operational hydraulic cylinder, the operational hydraulic cylinder working stroke is adjusted in classification, realizes the compensation in the gap between brake block and the brake disc.Characteristics are that gap adjustment is convenient, fast, regulate automatically.
The model utility content
The purpose of this utility model is: the working clamp that a kind of automatic stepless compensate for wear gap of disk type brake is provided.Behind the brake block and brake disc wearing and tearing of oil-well rig, well repairing machine hydraulic disc brake, the braking gap between energy automatic stepless compensation brake block and the brake disc.
The technical solution adopted in the utility model is: the working clamp in the automatic stepless compensate for wear gap of disk type brake, mainly form by two calipers, two brake block, two bearing pins, two levers, two poles, two pole axles, a working clamp oil cylinder, two extension springs and two oil cylinder bearing pins.Two strut fixation are installed on the support tong holder of hydraulic disc brake actuator.
Respectively there is a hole at the two ends of pole, and the pole axle passes pole two stomidiums, and the pole axle is vertical with pole, by the pole axle be connected with the intermediate hole of two levers respectively.
Respectively there is a pin shaft hole at the two ends of lever, and two calipers are connected with two lever ends by bearing pin respectively, brake block at the inboard setting-in of caliper;
Two oil cylinder bearing pins pass an end pin shaft hole of lever respectively and pass the pin shaft hole at working clamp oil cylinder two ends, and the working clamp oil cylinder is fixed between two levers.Be connected with an extension spring respectively at the two ends of oil cylinder bearing pin and in the both sides of working clamp oil cylinder, extension spring is fixed to the end of oil cylinder bearing pin by screw rod and nut.
Described working clamp oil cylinder mainly is made up of plunger, hydraulic joint, oil cylinder cover, cylinder body, piston, seal ring and one-way valve.At cylinder body and plunger outer end fixed block is arranged, pin shaft hole is arranged respectively on the fixed block, pin shaft hole can pass the oil cylinder bearing pin.
Plunger passes the oil cylinder cover center hole and inserts in the piston, and piston is formed compound oil hydraulic cylinder (secondary telescopic oil cylinder) in cylinder body.Be connected and fixed with bolt between oil cylinder cover and the cylinder body.1～3 mm clearance is arranged between piston and the oil cylinder cover.Piston has center hole, is fixed with one-way valve on the center hole of piston, and highly pressurised liquid can only flow in the cylinder body from piston cavity.There is intercommunicating pore outer end at plunger between the interior edge face of plunger, the outer end of intercommunicating pore is fixed with hydraulic joint.In that to have annular protrusion to make between plunger interior edge face and the piston inner bottom surface on the plunger interior edge face gapped.
Be equipped with cylindrical boss at the piston end face centre bit, be equipped with cylinder shape groove at the inner bottom surface centre bit of cylinder body.The boss of piston is inserted into the bottom of cylinder body groove, and 1～3 mm clearance is arranged between cylinder body inner bottom surface and piston end surface.
In order to emit the hydraulic oil between piston end surface and the cylinder body inner bottom surface, screw hole is arranged on cylinder body, screw hole is communicated with the gap between cylinder body inner bottom surface and the piston end surface.Plug or joint and valve are arranged on the screw hole.The plug of outwarding winding is emitted hydraulic oil, and piston can be got back to initial position.If joint and valve connecting line can import hydraulic oil in the hydraulic system.
In order to improve sealing, between plunger and piston, seal ring is arranged, between piston and cylinder body, seal ring is arranged.
The working principle of the working clamp in the automatic stepless compensate for wear gap of summary disk type brake:
Consult Fig. 1.Working clamp 1 is connected and fixed by pole and pedestal (tong holder).Consult Fig. 2.Lever can rotate around pole axle 8.When hydraulic disc brake need be braked, there is hydraulic oil to enter working clamp oil cylinder 9, under the effect of hydraulic coupling, 9 elongations of working clamp oil cylinder promote lever 6 and rotate around pole axle 8, thereby, the distance that is fixed on 4 of two brake block on two calipers 3 shortens, until being clamped on the brake disc, after clamping force reaches certain value, brake disc stops operating under the effect of brake weight, realizes the brake function of winch.Give 9 pressure releases of working clamp oil cylinder when the hydraulic disc brake control system, oil cylinder shrinks under the tension of extension spring 10, and correspondingly, 4 distances of two brake block become big, leave brake disc, and winch is in releasing orientation, and is free to rotate.
Consult Fig. 3.Be connected and fixed with bolt between the oil cylinder cover 14 of working clamp oil cylinder 9 and the cylinder body 15, piston 16 is installed in the cylinder body 15 and limits it by oil cylinder cover 14 and moves ultimate range.Working clamp oil cylinder of the present utility model is designed to the secondary telescopic oil cylinder, have two oil pockets, one oil pocket (to call the one-level oil pocket in the following text) for cylinder body 15 and 16 formation of piston, another is the oil pocket (to call the secondary oil pocket in the following text) of piston 16 and 12 formation of plunger, and its stroke designs according to working clamp brake block and brake disc abrasion condition in use.At the center of piston 16 hole is arranged, one-way valve 18 just is installed in this hole.The effect of one-way valve 18 is: when working clamp was braked, pressure oil can flow in the secondary oil pocket from the one-level oil pocket by center hole on the piston 16 and one-way valve 18; But when working clamp unclamped, hydraulic oil can not flow to the one-level oil pocket from the secondary oil pocket.Promptly realized the function in the gap that plunger 12 automatic stepless compensation brake block and brake disc wearing and tearing back form.Hydraulic oil can only flow to the secondary oil pocket from the one-level oil pocket, and can not reverse flow.Consequent result is when the pressure release of working clamp oil cylinder, under the tension of extension spring 10, have only the hydraulic oil in the one-level oil pocket to turn back in the hydraulic control system, and the hydraulic oil in the secondary oil pocket can not turn back in the hydraulic control system, can remain in the secondary oil pocket.
The beneficial effects of the utility model: the working clamp in the automatic stepless compensate for wear gap of the utility model disk type brake, this device has solved the braking gap stepless automatic compensation problem of hydraulic disc brake after brake block and brake disc wearing and tearing by two-level oil cylinder's design of working clamp oil cylinder, in the working clamp oil cylinder, the design runlength of piston is corresponding with the braking gap design load of brake disc with brake block, when working clamp clamps brake disc, piston outwards moves and remedies the braking gap design load, when between brake block and brake disc when also gapped, hydraulic oil flows into the secondary oil pocket by piston center hole and one-way valve, plunger outward is stretched out, contact and clamp brake disc with brake disc until brake block.During releasing of brake, the hydraulic control system pressure release only has the interior hydraulic oil of one-level oil pocket to flow back to hydraulic control system in oil pocket under the tension spring tension effect.Therefore, during releasing of brake, the working clamp oil cylinder partial journey of can only withdrawing, the gap of brake block and brake disc can only return to design load, and its wear extent is remedied automatically by the plunger overhang of working clamp oil cylinder in the working clamp brake process.May wear to a certain degree at brake block or brake disc, when reaching the thickness of producer's requirement replacing, with sebific duct hydraulic joint is connected with the hydraulic control system return line, the hydraulic oil in the secondary oil pocket is let out back in the hydraulic reservoir, make brake block get back to the maximum opening width of initial design.
It is accurate, safe and reliable that the utility model is regulated.Both overcome biliquid cylinder form compensation braking gap apparatus structure complexity, deficiencies such as maintenance inconvenience.
Description of drawings
Fig. 1 is a hydraulic disc brake device connection diagram.
Fig. 2 is the working clamp structural profile schematic representation in the automatic stepless compensate for wear gap of the utility model disk type brake.
Fig. 3 is can stepless elongation working clamp cylinder structure constitutional diagram.
Among the figure, 1. working clamp, 2. catch block, 3. caliper, 4. brake block, 5. bearing pin, 6. lever, 7. pole, 8. pole axle, 9. working clamp oil cylinder, 10. extension spring, 11. oil cylinder bearing pins, 12. plungers, 13. hydraulic joint, 14. oil cylinder covers, 15. cylinder bodies, 16. pistons, 17. seal rings, 18. one-way valves.
Embodiment
Embodiment 1: the working clamp with the automatic stepless compensate for wear gap of a disk type brake is an example, and the utility model is described in further detail.
Consult Fig. 2.The working clamp in the automatic stepless compensate for wear gap of disk type brake is made up of two calipers 3, two brake block 4, two bearing pins 5, two levers 6, two poles 7, two pole axles 8, working clamp oil cylinder 9, two extension springs 10 and two oil cylinder bearing pins 11.Two poles 7 are fixedly mounted on the support tong holder of hydraulic disc brake actuator.
Respectively there is a hole at the two ends of pole 7, and pole axle 8 passes 7 liang of stomidiums of pole, and pole axle 8 is vertical with pole 7, by pole axle 8 be connected with the intermediate hole of two levers 6 respectively.
Respectively there is a pin shaft hole at the two ends of lever 6, and two calipers 3 are connected with two lever 6 ends by bearing pin 5 respectively, brake block 4 at the inboard setting-in of caliper 3.
Two oil cylinder bearing pins 11 pass an end pin shaft hole of lever 6 respectively and pass the pin shaft hole at working clamp oil cylinder 9 two ends, and working clamp oil cylinder 9 is fixed between two levers 6.Be connected with an extension spring 10 respectively at the two ends of oil cylinder bearing pin 11 and in the both sides of working clamp oil cylinder 9, extension spring 10 is fixed to the end of oil cylinder bearing pin 11 by screw rod and nut.
Working clamp oil cylinder 9 mainly is made up of plunger 12, hydraulic joint 13, oil cylinder cover 14, cylinder body 15, piston 16, seal ring 17 and one-way valve 18.At cylinder body 15 and plunger 12 outer ends fixed block is arranged, pin shaft hole is arranged respectively on the fixed block, pin shaft hole can pass oil cylinder bearing pin 11.Cylinder body 15 internal diameters are 125 millimeters; 90 millimeters of the external diameters of plunger 12; 90 millimeters of oil cylinder cover 14 internal diameters.
Plunger 12 passes oil cylinder cover 14 center holes and inserts in the piston 16, and piston 16 is formed compound oil hydraulic cylinder in cylinder body 15.Be connected and fixed with bolt between oil cylinder cover 14 and the cylinder body 15.Between piston 16 and the oil cylinder cover 14 1 mm clearance is arranged.Piston 16 has center hole, is fixed with one-way valve 18 on the center hole of piston 16, and highly pressurised liquid can only flow in the cylinder body 15 from piston 16 inner chambers.To the intercommunicating pore that an inclination is arranged between the interior edge face of plunger 12, the outer end of intercommunicating pore is fixed with hydraulic joint in the outer end of plunger 12.1 mm clearance is arranged there being annular protrusion to make between plunger 12 interior edge faces and piston 16 inner bottom surfaces on plunger 12 interior edge faces.
End face centre bit at piston 16 is equipped with cylindrical boss, and being equipped with diameter at the inner bottom surface centre bit of cylinder body 15 is 40 millimeters cylinder shape groove.The boss of piston 16 is inserted into the bottom of cylinder body 15 grooves, between cylinder body 15 inner bottom surfaces and piston 16 end faces 1 mm clearance is arranged.
On cylinder body 15, screw hole is arranged, joint is arranged on the screw hole.Joint connects valve and pipeline.
Between plunger 12 and piston 16, seal ring 17 is arranged, between piston 16 and cylinder body 15, seal ring 17 is arranged.
Claims (3)
1. the working clamp in the automatic stepless compensate for wear gap of a disk type brake, mainly form by two calipers (3), two brake block (4), two bearing pins (5), two levers (6), two poles (7), two pole axles (8), a working clamp oil cylinder (9), two extension springs (10) and two oil cylinder bearing pins (11), respectively there is a hole at the two ends of pole (7), pole axle (8) passes pole (7) two stomidiums, pole axle (8) is vertical with pole (7), by pole axle (8) be connected with the intermediate hole of two levers (6) respectively;
Respectively there is a pin shaft hole at the two ends of lever (6), and two calipers (3) are connected with two levers (6) end by bearing pin (5) respectively, brake block (4) at the inboard setting-in of caliper (3);
Two oil cylinder bearing pins (11) pass an end pin shaft hole of lever (6) respectively and pass the pin shaft hole at working clamp oil cylinder (9) two ends, working clamp oil cylinder (9) is fixed between two levers (6), be connected with an extension spring (10) respectively at the two ends of oil cylinder bearing pin (11) and in the both sides of working clamp oil cylinder (9), extension spring (10) is fixed to the end of oil cylinder bearing pin (11) by screw rod and nut, it is characterized in that:
Described working clamp oil cylinder (9) mainly is made up of plunger (12), hydraulic joint (13), oil cylinder cover (14), cylinder body (15), piston (16), seal ring (17) and one-way valve (18), at cylinder body (15) and plunger (12) outer end fixed block is arranged, pin shaft hole is arranged respectively on the fixed block, and pin shaft hole can pass oil cylinder bearing pin (11);
Plunger (12) passes oil cylinder cover (14) center hole and inserts in the piston (16), and piston (16) is in cylinder body (15), form compound oil hydraulic cylinder, be connected and fixed with bolt between oil cylinder cover (14) and the cylinder body (15), between piston (16) and the oil cylinder cover (14) 1～3 mm clearance is arranged, piston (16) has center hole, on the center hole of piston (16), be fixed with one-way valve (18), highly pressurised liquid can only flow in the cylinder body (15) from piston (16) inner chamber, there is intercommunicating pore outer end at plunger (12) between the interior edge face of plunger (12), the outer end of intercommunicating pore is fixed with hydraulic joint, in that to have annular protrusion to make between plunger (12) interior edge face and piston (16) inner bottom surface on plunger (12) interior edge face gapped;
End face centre bit at piston (16) is equipped with cylindrical boss, inner bottom surface centre bit at cylinder body (15) is equipped with cylinder shape groove, the boss of piston (16) is inserted into the bottom of cylinder body (15) groove, between cylinder body (15) inner bottom surface and piston (16) end face 1～3 mm clearance is arranged.
2. the working clamp in the automatic stepless compensate for wear gap of disk type brake according to claim 1, it is characterized in that: on cylinder body (15), screw hole is arranged, screw hole is communicated with the gap between cylinder body 15 inner bottom surfaces and piston 16 end faces, and plug or joint and valve are arranged on the screw hole.
3. the working clamp in the automatic stepless compensate for wear gap of disk type brake according to claim 1 is characterized in that: between plunger (12) and piston (16) seal ring (17) is arranged, between piston (16) and cylinder body (15) seal ring (17) is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201731009U CN201496448U (en) | 2009-09-09 | 2009-09-09 | Working pliers for automatic stepless compensation of abrasion gap of disc brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201731009U CN201496448U (en) | 2009-09-09 | 2009-09-09 | Working pliers for automatic stepless compensation of abrasion gap of disc brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201496448U true CN201496448U (en) | 2010-06-02 |
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ID=42439656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201731009U Expired - Lifetime CN201496448U (en) | 2009-09-09 | 2009-09-09 | Working pliers for automatic stepless compensation of abrasion gap of disc brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201496448U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106641026A (en) * | 2016-12-02 | 2017-05-10 | 山东交通学院 | Drum type brake with automatic and continuous adjustable gap |
-
2009
- 2009-09-09 CN CN2009201731009U patent/CN201496448U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106641026A (en) * | 2016-12-02 | 2017-05-10 | 山东交通学院 | Drum type brake with automatic and continuous adjustable gap |
| CN106641026B (en) * | 2016-12-02 | 2018-11-06 | 山东交通学院 | A clearance automatic continuously adjustable drum brake |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100602 |